Adding global SConstruct
Merge branch 'master' of https://github.com/jmalicki/NaturalLanguageProcessing
Add Tagger constructors that only take TagLibrary, and make the TagLibrary part of Tagger, so it's always available
only need to include TagLibrary.hpp, and change name of test and suite in anticipation of more tests
support opening corpus regardless of working directory you run the test from
Use taglib from parent class, not from corpus
Add assertion that vector has size before trying to iterate over it
Make Corpus take an istream rather than filename, and
test that opening empty corpus sort of works.

HMMTagger still fails this.